[Bug 1575644] Re: resolvconf doesn't create the correct /etc/resolv.conf file when static IP addresses are used

[Thomas Hood]

If you install the dnsmasq package then that package starts a standalone
instance of the dnsmasq program and resolv.conf will contain a line
`nameserver 127.0.0.1` which tells the resolver to consult that instance
of the dnsmasq program, which will by default forward DNS queries to the
nameservers which would otherwise have been directly consulted by the
resolver.

The answer to the question "shouldn't those DNS servers should be
included in /etc/resolv.conf regardless of the presence of dnsmasq?" is
"no". Resolvconf doesn't list any nameserver addresses after any
loopback address, unless
TRUNCATE_NAMESERVER_LIST_AFTER_LOOPBACK_ADDRESS=no in
/etc/default/resolvconf.

When dnsmasq is installed does DNS function correctly? If so then there
is no problem.

** Description changed:

  By default, when installing ubuntu-desktop (and when installing some
  other packages as well), apt will also install dnsmasq as a dependency.
- When dnsmask is installed, and static IP addresses are used, resolv.conf
+ When dnsmasq is installed, and static IP addresses are used, resolv.conf
  creates a nearly empty /etc/resolv.conf file.  The file only contains
  entries for localhost and the search domain.  If static IP addresses are
  defined in /etc/network/interfaces, then shouldn't those DNS servers
  should be included in /etc/resolv.conf regardless of the presence of
- dnsmask?
+ dnsmasq?
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: resolvconf 1.78ubuntu2
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Wed Apr 27 08:34:24 2016
  InstallationDate: Installed on 2016-04-26 (0 days ago)
  InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3)
  PackageArchitecture: all
  SourcePackage: resolvconf
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1575644

Title:
  resolvconf doesn't create the correct /etc/resolv.conf file when
  static IP addresses are used

Status in resolvconf package in Ubuntu:
  Incomplete

Bug description:
  By default, when installing ubuntu-desktop (and when installing some
  other packages as well), apt will also install dnsmasq as a
  dependency.  When dnsmasq is installed, and static IP addresses are
  used, resolv.conf creates a nearly empty /etc/resolv.conf file.  The
  file only contains entries for localhost and the search domain.  If
  static IP addresses are defined in /etc/network/interfaces, then
  shouldn't those DNS servers should be included in /etc/resolv.conf
  regardless of the presence of dnsmasq?

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: resolvconf 1.78ubuntu2
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Wed Apr 27 08:34:24 2016
  InstallationDate: Installed on 2016-04-26 (0 days ago)
  InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3)
  PackageArchitecture: all
  SourcePackage: resolvconf
  UpgradeStatus: No upgrade log present (probably fresh install)

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